# physics

A piece of luggage is being loaded onto an airplane by way of an inclined conveyor belt. The bag, which has a mass of 15.0 kg, travels 4.50 m up the conveyor belt at a constant speed without slipping. If the conveyor belt is inclined at a 30.0° angle, calculate the work done on the bag by: the force of gravity (Wg) the normal force (WN) the friction force (Wf) the conveyor belt (Wconveyor) the net force (Wnet)

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1. 1) Find the height the bag went up: 4.5sin30. Work is mgh
2)Normal force can NEVER do work
3)The friction force is not moving the bag
4)Work done by belt must be PE gained. So mgh again.
5)Net force is zero. Constant speed.

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posted by Chanz

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